Display apparatus and light apparatus thereof

ABSTRACT

A display apparatus includes: a liquid crystal panel; and a light apparatus on which the liquid crystal panel is disposed, the light apparatus including: a substrate; a plurality of dimming blocks including a first dimming block and a second dimming block disposed immediately next to the first dimming block, each of the plurality of dimming blocks including at least one respective light source disposed on a first side of the substrate; and a plurality of driving devices disposed on the first side of the substrate and including a first driving device disposed in the first dimming block and a second driving device disposed in the second dimming block, each driving device of the plurality of driving devices being configured to provide a driving current to the at least one respective light source included in a respective one of the plurality of dimming blocks, wherein the first driving device and the second driving device are disposed at relatively different positions respectively within the first dimming block and the second dimming block.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of U.S. application Ser. No.17/863,918, filed on Jul. 13, 2022, which is a Continuation of U.S.application Ser. No. 17/473,283, filed on Sep. 13, 2021 (now U.S. Pat.No. 11,410,619), which is a Continuation of U.S. application Ser. No.17/350,735 filed on Jun. 17, 2021 (now U.S. Pat. No. 11,227,556), whichis a bypass continuation application of International Application No.PCT/KR2021/002832, filed on Mar. 8, 2021, which is based on and claimspriority under 35 U.S.C. § 119 to Korean Patent Application No.10-2020-0167251, filed on Dec. 3, 2020, in the Korean IntellectualProperty Office, and Korean Patent Application No. 10-2020-0182552,filed on Dec. 23, 2020, in the Korean Intellectual Property Office, thedisclosures of which are incorporated by reference herein in theirentireties.

BACKGROUND 1. Field

The disclosure relates to a display apparatus and a light apparatusthereof, and more particularly, to a thin display apparatus and a lightsource module thereof.

2. Description of Related Art

In general, display apparatuses are a type of output devices fordisplaying obtained or stored electrical information for the user byconverting the electrical information to visual information. Displayapparatuses are used in various fields such as homes or work places.

There are many different display apparatuses such as monitor devicesconnected to personal computers (PCs) or server computers, portablecomputer systems, Global Positioning System (GPS) terminals, generaltelevision sets, Internet protocol televisions (IPTVs), portableterminals, e.g., smart phones, tablet PCs, personal digital assistants(PDAs), and cellular phones, other display devices for reproducingimages like advertisements or films, or other various kinds ofaudio/video systems.

The display apparatus includes a light source module to convertelectrical information to visual information, and the light sourcemodule includes a plurality of light sources to separately emit light.Each of the plurality of light sources may include, for example, a lightemitting diode (LED) or an organic LED (OLED). For example, the LED orthe OLED may be mounted on a circuit board or a board.

Thickness of display apparatuses is becoming thinner. To implement sucha thin display apparatus, the light source module is getting thinner aswell.

As the thickness of the light source module becomes thinner, the lightsource module may have an optical defect (e.g., mura) that isrecognizable to the user. For example, the optical defect may be causedby an arrangement of LEDs or an arrangement of driving circuits in thethin light source module.

SUMMARY

Provided are a display apparatus and light apparatus thereof, capable ofpreventing or suppressing an optical defect (e.g., mura).

Additional aspects will be set forth in part in the description thatfollows and, in part, will be apparent from the description, or may belearned by practice of presented embodiments.

According to an aspect of the disclosure, there is provided a displayapparatus including: a liquid crystal panel; and a light apparatus onwhich the liquid crystal panel is disposed, the light apparatusincluding: a substrate; a plurality of dimming blocks including a firstdimming block and a second dimming block disposed immediately next tothe first dimming block, each dimming block of the plurality of dimmingblocks including at least one respective light source disposed on afirst side of the substrate; and a plurality of driving devices disposedon the first side of the substrate and including a first driving devicedisposed in the first dimming block and a second driving device disposedin the second dimming block, each driving device of the plurality ofdriving devices being configured to provide a driving current to the atleast one respective light source included in a respective one of theplurality of dimming blocks, wherein the first driving device and thesecond driving device are disposed at relatively different positionsrespectively within the first dimming block and the second dimmingblock.

An arrangement of the first driving device in the first dimming blockmay be different from an arrangement of the second driving device in thesecond dimming block that is adjacent to the first dimming block.

The plurality of dimming blocks may be arranged in a plurality of rowsand a plurality of columns, and an arrangement of the first drivingdevice in the first dimming block may be different from an arrangementof the second driving device in the second dimming block that isarranged in a same row or column as the first dimming block and isadjacent to the first dimming block.

The first driving device may be arranged outside a virtual line that isdefined by the second driving device and a third driving device amongthe plurality of driving devices closest to the first driving device.

The plurality of dimming blocks may emit light with differentbrightnesses.

The first driving device may be further configured to supply the drivingcurrent to light sources included in at least two dimming blocks amongthe plurality of dimming blocks.

The first driving device may be arranged in the first dimming blockamong the at least two dimming blocks.

A third dimming block in which the first driving device is arranged anda fourth dimming block in which none among the plurality of drivingdevices is arranged, may be alternately arranged.

An arrangement of the first driving device in the at least two dimmingblocks may be different from an arrangement of the second driving devicein at least other two dimming blocks.

The display apparatus may further include a dimming driver provided on asecond surface of the substrate, the dimming driver being configured toprovide a dimming signal to the plurality of driving devices.

The dimming driver may be further configured to provide the dimmingsignal to the plurality of driving devices in an active matrix scheme.

The plurality of driving devices may be arranged in a plurality of rowsand a plurality of columns, and the dimming driver may be furtherconfigured to provide a scan signal to driving devices arranged in onerow among the plurality of rows; and provide the dimming signal todriving devices arranged in one column among the plurality of columns.

The at least one light source may include: a light emitting diode (LED)directly contacting wiring on the substrate; and an optical domecovering the LED.

The LED includes a distributed Bragg reflector (DBR) formed on a surfacefrom which light is emitted.

According to an aspect of the disclosure, there is provided a lightapparatus including: a substrate; a plurality of dimming blocksincluding a first dimming block and a second dimming block disposedimmediately next to the first dimming block, each of the plurality ofdimming blocks including at least one respective light source disposedon a first side of the substrate; and a plurality of driving devicesdisposed on the first side of the substrate and including a firstdriving device disposed in the first dimming block and a second drivingdevice disposed in the second dimming block, each of the plurality ofdriving devices being configured to provide a driving current to the atleast one respective light source included in a respective one of theplurality of dimming blocks, wherein the first driving device and thesecond driving device are disposed at relatively different positionsrespectively within the first dimming block and the second dimmingblock.

An arrangement of the first driving device in the first dimming blockmay be different from an arrangement of the second driving device in thesecond dimming block that is adjacent to the first dimming block.

The plurality of dimming blocks may be arranged in a plurality of rowsand a plurality of columns, and an arrangement of the first drivingdevice in the first dimming block may be different from an arrangementof the second driving device in the second dimming block that isarranged in a same row or column as the first dimming block and isadjacent to the first dimming block.

The first driving device may be arranged outside a virtual line that isdefined by the second driving device and a third driving device amongthe plurality of driving devices closest to the first driving device.

According to an aspect of the disclosure, there is provided a displayapparatus including: a liquid crystal panel; and a light apparatusincluding: a substrate; a plurality of dimming blocks, each dimmingblock of the plurality of dimming blocks including at least one lightsource provided on a first surface of the substrate; and a plurality ofdriving devices provided on the first surface of the substrate, eachdriving device of the plurality of driving devices being configured tosupply a driving current to the at least one light source included in arespective dimming block among the plurality of dimming blocks, whereina first driving device among the plurality of driving devices isarranged outside a virtual line that is defined by a second drivingdevice and a third driving device among the plurality of driving devicesclosest to the first driving device.

An arrangement of the first driving device in a first dimming blockamong the plurality of dimming blocks may be different from anarrangement of the second driving device in a second dimming block amongthe plurality of dimming blocks that is adjacent to the first dimmingblock and an arrangement of the third driving device in a third dimmingblock among the plurality of dimming block that is adjacent to the firstdimming block.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the disclosure will be more apparent from the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is an exterior view of a display apparatus, according to anembodiment;

FIG. 2 is an exploded view of a display apparatus, according to anembodiment;

FIG. 3 is a plan view of a liquid crystal panel of a display apparatus;according to an embodiment;

FIG. 4 is an exploded view of a light apparatus of a display apparatus,according to an embodiment;

FIG. 5 is a perspective view of a light source included in a lightapparatus, according to an embodiment;

FIG. 6 is a cross-sectional view of a light emitting diode (LED)included in a light apparatus, according to an embodiment;

FIG. 7 is a block diagram of a display apparatus, according to anembodiment;

FIG. 8 is a plan view of dimming blocks of a light apparatus included ina display apparatus, according to an embodiment;

FIG. 9 is a diagram of an example in which a display apparatus convertsimage data to dimming data, according to an embodiment;

FIG. 10 is a circuit block diagram of a dimming driver and a lightapparatus included in a display apparatus, according to an embodiment;

FIG. 11 is a circuit block diagram of a driving device included in adisplay apparatus, according to an embodiment;

FIG. 12 is a cross-sectional view of a dimming driver, driving devicesand light sources included in a display apparatus, according to anembodiment;

FIG. 13 is a plan view of driving devices included in a displayapparatus, according to an embodiment;

FIG. 14 is a plan view of driving devices included in a displayapparatus, according to an embodiment;

FIG. 15 is a plan view of driving devices included in a displayapparatus, according to an embodiment;

FIG. 16 is a circuit block diagram of a dimming driver and a lightapparatus included in a display apparatus, according to an embodiment;

FIG. 17 is a circuit block diagram of a driving device included in adisplay apparatus, according to an embodiment;

FIG. 18 is a plan view of driving devices included in a displayapparatus, according to an embodiment;

FIG. 19 is a plan view of driving devices included in a displayapparatus, according to an embodiment;

FIG. 20 is a plan view of driving devices included in a displayapparatus, according to an embodiment; and

FIG. 21 is a plan view of driving devices included in a displayapparatus, according to an embodiment.

DETAILED DESCRIPTION

Like numerals refer to like elements throughout the specification. Notall elements of embodiments of the disclosure will be described, anddescription of what are commonly known in the art or what overlap eachother in the embodiments will be omitted. The terms as used throughoutthe specification, such as “˜ part”, “˜ module”, “˜ member”, “block”,etc., may be implemented in software and/or hardware, and a plurality of“˜ parts”, “˜ modules”, “˜ members”, or “˜ blocks” may be implemented ina single element, or a single “˜ part”, “˜ module”, “˜ member”, or “˜block” may include a plurality of elements.

It will be further understood that the term “connect” or its derivativesrefer both to direct and indirect connection, and the indirectconnection includes a connection over a wireless communication network.

The term “include (or including)” or “comprise (or comprising)” isinclusive or open-ended and does not exclude additional, unrecitedelements or method steps, unless otherwise mentioned.

Throughout the specification, when it is said that a member is located“on” another member, it implies not only that the member is locatedadjacent to the other member but also that a third member exists betweenthe two members.

It will be understood that, although the terms first, second, third,etc., may be used herein to describe various elements, components,regions, layers and/or sections, these elements, components, regions,layers and/or sections may not be limited by these terms. These termsare only used to distinguish one element, component, region, layer orsection from another region, layer or section.

It is to be understood that the singular forms “a,” “an,” and “the”include plural references unless the context clearly dictates otherwise.

Reference numerals used for method steps are just used for convenienceof explanation, but not to limit an order of the steps. Thus, unless thecontext clearly dictates otherwise, the written order may be practicedotherwise.

The principle and embodiments of the disclosure will now be describedwith reference to accompanying drawings.

FIG. 1 is an exterior view of a display apparatus, according to anembodiment.

A display apparatus 10 is a device for processing image signals receivedfrom the outside and visually presenting the processed image. In thefollowing description, it is assumed that the display apparatus 10 is atelevision (TV), but embodiments of the disclosure are not limitedthereto. For example, the display apparatus 10 may be implemented invarious forms, such as a monitor, a portable multimedia device, aportable communication device, and any device capable of visuallypresenting images, without being limited thereto.

The display apparatus 10 may be a large format display (LFD) installedoutdoors such as on a rooftop of a building or at a bus stop. Thedisplay apparatus 10 is not, however, exclusively installed outdoors,but may be installed at any place, even indoors with a lot of foottraffic, e.g., at subway stations, shopping malls, theaters, offices,stores, etc.

The display apparatus 10 may receive contents including video and audiosignals from various content sources and output video and audiocorresponding to the video and audio signals. For example, the displayapparatus 10 may receive content data through a broadcast receivingantenna or a cable, receive content data from a content reproducingdevice, or receive content data from a content providing server of acontent provider.

As shown in FIG. 1 , the display apparatus 10 includes a main body 11, ascreen 12 for displaying an image I, and a stand 17 supporting the mainbody 11 and the screen 12.

The main body 11 forms the exterior of the display apparatus 10, andcomponents for the display apparatus 10 to display the image I orperform many different functions may be included in the main body 11.Although the main body 11 of FIG. 1 is shaped like a flat plate, it isnot limited thereto. For example, the main body 11 may have the form ofa curved plate.

The screen 12 may be formed on the front of the main body 11 fordisplaying the image I. For example, the screen 12 may display stillimages or moving images. For example, the screen 12 may display twodimensional (2D) plane images, or three dimensional (3D) stereographicimages using parallax of both eyes of the user.

The screen 12 may include, e.g., a self-luminous panel (e.g., a lightemitting diode (LED) panel or an organic LED (OLED) panel) capable ofemitting light at first hand, or non-luminous panel (e.g., a liquidcrystal panel) capable of passing or blocking light emitted from, e.g.,a light apparatus (e.g., a backlight).

A plurality of pixels P are formed on the screen 12, and the image Idisplayed on the screen 12 may be formed by the light emitted by each ofthe plurality of pixels P. For example, the light emitted by each of theplurality of pixels P may be combined like a mosaic into the image I onthe screen 12.

Each of the plurality of pixels P may emit light in various colors andbrightnesses. Each of the plurality of pixels P may include subpixelsPR, PG, and PB to emit different colors of light.

The subpixels PR, PG, and PB may include a red subpixel PR to emit redlight, a green subpixel PG to emit green light, and blue subpixel PB toemit blue light PB. For example, the red light may have wavelengths ofabout 620 nanometers (nm, a billionth of a meter) to about 750 nm; greenlight may have wavelengths of about 495 nm to about 570 nm; blue lightmay have wavelengths of about 430 nm to about 495 nm.

By combinations of the red light of the red subpixel PR, the green lightof the green subpixel PG, and the blue light of the blue subpixel PB,each of the plurality of pixels P may emit various brightnesses andcolors of light.

FIG. 2 is an exploded view of a display apparatus, according to anembodiment. FIG. 3 is a plan view of a liquid crystal panel of a displayapparatus, according to an embodiment.

As shown in FIG. 2 , the main body 11 may contain many different kindsof components to create the image I on the screen S.

For example, a light apparatus 100, which is a surface light source, aliquid crystal panel 20 for blocking or passing the light emitted fromthe light apparatus 100, a control assembly 50 for controllingoperations of the light apparatus 100 and the liquid crystal panel 20,and a power assembly 60 for supplying power to the light apparatus 100and the liquid crystal panel 20 are equipped in the may body 11.Furthermore, the main body 11 includes a bezel 13, a frame middle mold14, a bottom chassis 15, and a rear cover 16 to support and secure theliquid crystal panel 20, the light apparatus 100, the control assembly50, and the power assembly 60. An opening 15 a is formed at the bottomchassis 15 to electrically connect the light apparatus 100 to thecontrol assembly 50 and the power assembly 60.

The light apparatus 100 may include a point light source for emittingmonochromatic light or white light, and refract, reflect, and scatterthe light emitted from the point light source to convert the light touniform surface light. In this way, the light apparatus 100 may emit theuniform surface light in a forward direction by refracting, reflectingand scattering the light emitted from the point light source.

The light apparatus 100 will now be described in more detail.

The liquid crystal panel 20 is arranged in front of the light apparatus100 for blocking or passing the light emitted from the light apparatus100 to produce the image I.

The front surface of the liquid crystal panel 20 may form the screen Sof the aforementioned display apparatus 10, and the liquid crystal panel20 may include the plurality of pixels P. The plurality of pixels Pincluded in the liquid crystal panel 20 may separately block or pass thelight from the light apparatus 100, and the light having passed theplurality of pixels P forms the image I to be displayed on the screen S.

For example, as shown in FIG. 3 , the liquid crystal panel 20 mayinclude a first polarizer film 21, a first transparent substrate 22, apixel electrode 23, a thin film transistor (TFT) 24, a liquid crystallayer 25, a common electrode 26, a color filter 27, a second transparentsubstrate 28, and a second polarizer film 29.

The first transparent substrate 22 and the second transparent substrate28 may securely support the pixel electrode 23, the TFT 24, the liquidcrystal layer 25, the common electrode 26, and the color filter 27. Thefirst and second transparent substrates 22 and 28 may be formed oftempered glass or transparent resin.

The first polarizer film 21 and the second polarizer film 29 arearranged on outer sides of the first and second transparent substrates22 and 28. The first and second polarizer films 21 and 29 may each passparticular light while blocking the other light. For example, the firstpolarizer film 21 may pass polarized light in a first direction whileblocking differently polarized light. Furthermore, the second polarizerfilm 29 may pass polarized light in a second direction while blockingdifferently polarized light. The first and second directions may beperpendicular to each other. As a result, the polarized light that haspassed the first polarizer film 21 may not pass the second polarizerfilm 29.

The color filter 27 may be arranged on the inner side of the secondtransparent substrate 28. The color filter 27 may include, for example,a red color filter 27R for passing red light, a green color filter 27Gfor passing green light, and a blue color filter 27B for passing bluelight, and the red, green, blue color filters 27R, 27G, and 27B may bearranged side by side. An area in which the color filter 27 is formedcorresponds to the pixel P as described above. An area where the redcolor filter 27R is formed corresponds to the red subpixel PR; an areawhere the green color filter 27G is formed corresponds to the greensubpixel PG; an area where the blue color filter 27B is formedcorresponds to the blue subpixel PB.

The pixel electrode 23 may be arranged on the inner side of the firsttransparent substrate 22, and the common electrode 26 may be arranged onthe inner side of the second transparent substrate 28. The pixelelectrode 23 and the common electrode 26 are formed of a conductivemetal material, and may produce an electric field to change arrangementof liquid crystal molecules 115 a that form the liquid crystal layer 25,which will be described below.

The thin film transistor (TFT) 24 is arranged on the inner side of thesecond transparent substrate 22. The TFT 24 may pass or block thecurrent flowing in the pixel electrode 23. For example, depending onwhether the TFT 24 is turned on (closed) or turned off (opened), anelectric field may be formed or removed from between the pixel electrode23 and the common electrode 26.

The liquid crystal layer 25 is formed between the pixel electrode 23 andthe common electrode 26 and filled with liquid crystal molecules 25 a.The liquid crystals are in an intermediate state between solid (crystal)and fluid. The liquid crystals reveal an optical property according to achange in electric field. For example, the liquid crystal may havevarying directions of arrangement of molecules that form the liquidcrystal, according to a change in electric field. Consequently, theoptical property of the liquid crystal layer 25 may be changed accordingto whether there is an electric field passing the liquid crystal layer25.

On one side of the liquid crystal panel 20, provided are a cable 20 afor transmitting image data to the liquid crystal panel 20 and a displaydriver integrated circuit (DDI) 30 (hereinafter, called a ‘paneldriver’) for processing digital image data to output an analog imagesignal.

The cable 20 a may electrically connect between the control assembly50/the power assembly 60 and the panel driver 30 and further between thepanel driver 30 and the liquid crystal panel 20. The cable 20 a mayinclude, e.g., a bendable flexible flat cable or film cable.

The panel driver 30 may receive image data and power from the controlassembly 50/power assembly 60 through the cable 20 a, and transmit imagedata and a driving current to the liquid crystal panel 20 through thecable 20 a.

Furthermore, the cable 110 b and the panel driver 30 may be integrallyimplemented as a film cable, a chip on film (COF), a table carrierpackage (TCP), etc. In other words, the panel driver 30 may be arrangedon the cable 20 b. It is not, however, limited thereto, and the paneldriver 30 may be arranged on the liquid crystal panel 20.

The control assembly 50 may include a control circuit for controllingoperations of the liquid crystal panel 20 and the light apparatus 100.The control circuit may process image data received from an externalcontent source, transmit image data to the liquid crystal panel 20, andtransmit dimming data to the light apparatus 100.

The power assembly 60 may supply power to the liquid crystal panel 20and the light apparatus 100 so as for the light apparatus 100 to outputsurface light and for the liquid crystal panel 20 to block or pass thelight from the light apparatus 100.

The control assembly 50 and the power assembly 60 may be implementedwith printed circuit boards (PCBs) and various circuits mounted on thePCBs. For example, a power circuit may include a power circuit board,and a capacitor, a coil, a resistor, a processor, etc., which aremounted on the power circuit board. Furthermore, the control circuit mayinclude a control circuit board with a memory and a processor mountedthereon.

FIG. 4 is an exploded view of a light apparatus of a display apparatus,according to an embodiment. FIG. 5 is a perspective view of a lightsource included in a light apparatus, according to an embodiment. FIG. 6is a cross-sectional view of a light emitting diode (LED) included in alight apparatus, according to an embodiment.

As shown in FIG. 4 , the light apparatus 100 includes a light sourcemodule 110 for generating light, a reflecting sheet 120 for reflectinglight, a diffuser plate 130 for uniformly diffusing light, and anoptical sheet 140 for enhancing brightness of output light.

The light source module 110 may include a plurality of light sources 111for emitting light, and a substrate 112 for supporting/fixing theplurality of light sources 111.

The plurality of light sources 111 may be arranged in a predefinedpattern to emit light with uniform brightness. The plurality of lightsources 111 may be arranged such that a light source is equi-distantfrom its neighboring light sources.

For example, as shown in FIG. 4 , the plurality of light sources 111 maybe arranged in rows and columns. Accordingly, the plurality of lightsources may be arranged such that neighboring four light sources formalmost a rectangle. Furthermore, a light source is located to beadjacent to four other light sources, and the distances between thelight source and the four neighboring light sources are almost the same.

In another example, the plurality of light sources may be arranged inmultiple rows, and a light source belonging to a row may be placed inthe middle of two light sources belonging to two neighboring rows.Accordingly, the plurality of light sources may be arranged such thatneighboring three light sources form almost a triangle. In this case, alight source is located to be adjacent to six other light sources, andthe distances between the light source and the six neighboring lightsources are almost the same.

The arrangement of the plurality of light sources 111 is not, however,limited thereto, and the plurality of light sources 111 may be arrangedin various ways to emit light in even brightness.

The light sources 111 may employ devices capable of emittingmonochromatic light (light having a particular wavelength, e.g., bluelight) or white light (mixed light of red light, green light, and bluelight) to various directions when powered.

Each of the plurality of light sources 111 includes an LED 190 and anoptical dome 180.

The thinner the thickness of the display apparatus 10, the thinner thethickness of the light apparatus 100. To make the light apparatus 100become thinner, each of the plurality of light sources 111 gets thinnerand the structure becomes simpler.

The LED 190 may be attached directly to the substrate 112 in a method ofchip on board (COB). In other words, the light source 111 may includethe LED 190 with an LED chip or an LED die attached directly to thesubstrate 112 without extra packaging.

The LED 190 may be manufactured in a flip chip type. The LED 190 of theflip chip type may not use an intermediate medium such as a metal lead(wire) or a ball grid array (BGA) to attach the LED, which is asemiconductor device, to the substrate 112, but may fuse an electrodepattern of the semiconductor device onto the substrate 112 as it is.This may make it possible for the light source 111 including the LED 190of the flip chip type to become smaller by omitting the metal lead(wire) or the ball grid array.

For example, the LED 190 may be a distributed Bragg reflector (DBR) LEDincluding a DBR as shown in FIG. 6 .

The LED 190 includes a transparent substrate 195, an n-typesemiconductor layer (e.g., n-type gallium nitride (n-type GaN)) 193 anda p-type semiconductor layer (e.g., p-type GaN) 192. A multi quantumwells (MQW) layer 194 and an electron-blocking layer (EBL) 197 areformed between the n-type semiconductor layer 193 and the p-typesemiconductor layer 192. When a current is applied to the LED 190,electrons and halls may be re-coupled in the MQW layer 194, therebyemitting light.

A first electrode 191 a of the LED 190 electrically contacts the p-typesemiconductor layer 192, and a second electrode 191 b electricallycontacts the n-type semiconductor layer 193. The first electrode 191 aand the second electrode 191 b may serve not only as electrodes but alsoas reflectors that reflect light.

A DBR layer 196 is arranged on the outer side of the transparentsubstrate 195. The DBR layer 196 may be formed by stacking up materialswith different refractive indexes, and the DBR layer 196 may reflectincident light. As the DBR layer 196 is arranged on the outer side(upper side in the drawing) of the transparent substrate 195, lightentering perpendicularly to the DBR layer 196 may be reflected by theDBR layer 196. Accordingly, the intensity of light emitted in adirection D1 perpendicular to the DBR layer 196 (in the upper directionof the LED in the drawing) is lower than the intensity of light emittedin a direction D2 slanted from the DBR layer 196 (e.g., a directionslanted from the upper direction in the drawing at about 60 degrees). Inother words, the LED 190 may emit more intense light in a lateraldirection than in the perpendicular direction.

The optical dome 180 may cover the LED 190. The optical dome 180 mayprevent or suppress damage to the LED 190 due to an external mechanicalaction and/or chemical action.

The optical dome 180 may be shaped like, for example, a dome obtained bycutting a sphere without including the center or a semi-sphere obtainedby cutting the sphere with the center included. A vertical cross-sectionof the optical dome 180 may have, e.g., an arcuate form or asemi-circular form.

The optical dome 180 may be formed of silicon or epoxy resin. Forexample, melted silicon or epoxy resin is discharged onto the LED 190through, e.g., a nozzle, and then hardened to form the optical dome 180.

Accordingly, depending on viscosity of the fluid silicon or epoxy resin,the shape of the optical dome 180 may be variously changed. For example,when the optical dome 180 is manufactured with silicon with athixotropic index of about 2.7 to 3.3 (e.g., 3.0), the optical dome 180having a dome ratio of about 0.25 to 0.31 (e.g., 0.28) representing aratio of dome height to a diameter of the bottom side of the dome (domeheight/diameter of bottom side) may be formed. For example, the opticaldome 180 manufactured with the silicon having the thixotropic index ofabout 2.7 to 3.3 (e.g., 3.0) may have a diameter of the bottom side ofabout 2.5 mm and height of about 0.7 mm.

The optical dome 180 may be optically transparent or translucent. Lightemitted from the LED 190 may pass through the optical dome 180 to theoutside.

In this case, the dome-shaped optical dome 180 may refract the lightlike a lens. For example, the light emitted from the LED 190 may berefracted and dispersed by the optical dome 180.

As such, the optical dome 180 may not only protect the LED 190 from anexternal mechanical action and/or chemical action or electrical action,but also diffuse the light emitted from the LED 190.

The substrate 112 may fix the plurality of light sources 111 to preventthe light sources 111 from being moved. In addition, the substrate 112may supply power to each of the light sources 111 so that the lightsource 111 may emit light.

The substrate 112 may fix the plurality of light sources 111, and may beformed of a synthetic resin, tapered glass or a printed circuit board(PCB) with conductive power supply lines formed therein to supply powerto the light sources 111.

The reflecting sheet 120 may reflect light emitted from the plurality oflight sources 111 to a forward direction or to an approximate directionto the forward direction.

A plurality of through holes 120 a are formed in the reflecting sheet120 at positions corresponding to the plurality of light sources 111 ofthe light source module 110. Furthermore, the light sources 111 of thelight source module 110 may pass the through holes 120 a and protrudeforward from the reflecting sheet 120. Accordingly, the plurality oflight sources 111 may emit light from the front of the reflecting sheet120. The reflecting sheet 120 may reflect the light emitted from theplurality of light sources 111 toward the reflecting sheet 120 towardthe diffuser plate 130.

The diffuser plate 130 may be arranged in front of the light sourcemodule 110 and the reflecting sheet 120 to uniformly diffuse the lightemitted from the light sources 111 of the light source module 110.

As described above, the plurality of light sources 111 areequi-distantly arranged on the rear surface of the light apparatus 100.This may cause different brightness depending on the locations of theplurality of light sources 111.

To eliminate the difference in brightness due to the plurality of lightsources 111, the diffuser plate 130 may diffuse the light emitted fromthe plurality of light sources 111 within the diffuser plate 130. Inother words, the diffuser plate 130 may uniformly emit non-uniform lightforward from the plurality of light sources 111.

An optical sheet 140 may include various sheets to improve brightnessand uniformity of the brightness. For example, the optical sheet 140 mayinclude a diffuser sheet 141, a first prism sheet 142, a second prismsheet 143, a reflective polarizer sheet 144, etc. The optical sheet 140is not limited to the sheets or films as illustrated in FIG. 4 , and mayfurther include various other sheets or films such as protective sheets.

FIG. 7 is a block diagram of a display apparatus, according to anembodiment. FIG. 8 is a plan view of dimming blocks of a light apparatusincluded in a display apparatus, according to an embodiment. FIG. 9 is adiagram of an example in which a display apparatus converts image datato dimming data, according to an embodiment.

As shown in FIG. 7 , the display apparatus 10 includes a contentreceiver 80, an image processor 90, a panel driver 30, a liquid crystalpanel 20, a dimming driver 170, and a light apparatus 100.

The content receiver 80 may include receiving terminals 81 and a tuner82 for receiving contents including video signals and/or audio signalsfrom content sources.

The receiving terminals 81 may receive video signals and audio signalsfrom the content sources through a cable. For example, the receivingterminals 81 may include a component (YPbPr/RGB) terminal, a compositevideo blanking and sync (CVBS) terminal, an audio terminal, a highdefinition multimedia interface (HDMI) terminal, a universal serial bus(USB) terminal, etc.

The tuner 82 may receive broadcast signals through a broadcast receivingantenna or a cable, and extract a broadcast signal on a channel selectedby the user from among the received broadcast signals. For example, thetuner 82 may pass a broadcast signal having a frequency corresponding toa channel selected by the user among the plurality of broadcast signalsreceived through the broadcast receiving antenna or the cable, and blockthe other broadcast signals having different frequencies.

As such, the content receiver 80 may receive video signals and audiosignals from the content sources through the receiving terminals 81and/or the tuner 82, and output the video signals and/or audio signalsreceived through the receiving terminals 81 and/or the tuner 82 to theimage processor 90.

The image processor 90 may include a processor 91 for processing imagedata and a memory 92 for memorizing/storing data.

The memory 92 may store a program and data for processing video signalsand/or audio signals, and temporarily store data generated in theprocess of handling the video signals and/or audio signals.

The memory 92 may include a non-volatile memory, such as a Read OnlyMemory (ROM), a flash memory, and/or the like, and a volatile memory,such as a static random access memory (SRAM), a dynamic RAM (DRAM), orthe like.

The processor 91 may receive video signals and/or audio signals from thecontent receiver 80, decode the video signal to image data, and generatedimming data from the image data. The image data and the dimming datamay be output to the panel driver 30 and the dimming driver 170.

The display apparatus 10 may perform operations to improve a contrastratio of an image.

As described above, the light apparatus 100 may include the plurality oflight sources 111, and diffuse light emitted from the plurality of lightsources 111 to output surface light. The liquid crystal panel 20 mayinclude a plurality of pixels, and control the plurality of pixels eachto pass or block light. Light that has passed the plurality of pixelsmay form an image.

In this case, the display apparatus 10 may turn off light sources of thelight apparatus 100 corresponding to dark portions of the image tofurther darken the dark portions of the image. Accordingly, the contrastratio of the image may be enhanced.

As such, the operation performed by the display apparatus 10 to controlthe light apparatus 100 not to emit light from portions corresponding todark portions of the image is called “local dimming”.

For local dimming, the plurality of light sources 111 included in thelight source module 110 may be classified into a plurality of dimmingblocks 200, as shown in FIG. 8 . In FIG. 8 , a total of 49 dimmingblocks, which is 7×7 wide and long, are shown, but the number andarrangement of the dimming blocks is not limited to what is shown inFIG. 8 .

Each of the plurality of dimming blocks 200 may include at least onelight source 111. The light apparatus 100 may apply the same drivingcurrent to light sources belonging to the same dimming block, and thelight sources belonging to the same dimming block may emit light withthe same brightness.

Furthermore, the light apparatus 100 may apply different drivingcurrents to light sources belonging to different dimming blocksdepending on dimming data, and the light sources belonging to thedifferent dimming blocks may emit light with different brightness.

The processor 91 may provide dimming data for local dimming to the lightapparatus 100. The dimming data may include information about brightnessof each of the plurality of dimming blocks 200. For example, the dimmingdata may include information regarding intensity of light output fromlight sources included in each of the plurality of dimming blocks 200.

The processor 91 may obtain dimming data from image data decoded from avideo signal.

The processor 91 may convert image data to dimming data in variousmethods. For example, as shown in FIG. 9 , the processor 91 maypartition the image I from the image data into a plurality of imageblocks IB. The number of the plurality of image blocks IB is the same asthe number of the plurality of dimming blocks 200, and the plurality ofimage blocks IB may correspond to the plurality of dimming blocks 200,respectively.

The processor 91 may obtain brightness values L of the plurality ofdimming blocks 200 from the image data of the plurality of image blocksIB. Furthermore, the processor 91 may generate dimming data by combiningthe brightness values L of the plurality of dimming blocks 200.

For example, the processor 91 may obtain the brightness value L of eachof the plurality of dimming blocks 200 based on a maximum value ofbrightness values of pixels included in each image block IB.

An image block includes a plurality of pixels, and image data of animage block may include image data of the plurality of pixels (e.g., reddata, green data, blue data, etc.). The processor 91 may calculate abrightness value of each of the pixels based on image data of the pixel.

The processor 91 may determine a maximum value of brightness values ofpixels included in an image block as a brightness value of a dimmingblock corresponding to the image block. For example, the processor 91may determine a maximum value of brightness values of pixels included inan i-th image block IB(i) as a brightness value L(i) of an i-th dimmingblock, and determine a maximum value of brightness values of pixelsincluded in an j-th image block IB(j) as a brightness value Lj) of anj-th dimming block.

The processor 91 may generate dimming data by combining the brightnessvalues of the plurality of dimming blocks 200.

As such, the image processor 90 may decode a video signal obtained bythe content receiver 80 into image data, and generate dimming data fromthe image data. Furthermore, the image processor 90 may transmit theimage data and the dimming data to the liquid crystal panel 20 and thelight apparatus 100, respectively.

The liquid crystal panel 20 includes a plurality of pixels capable ofpassing or blocking light, and the plurality of pixels are arranged inthe form of a matrix. In other words, the plurality of pixels may bearranged in a plurality of rows and a plurality of columns.

The panel driver 30 may receive image data from the image processor 90,and drive the liquid crystal panel 20 according to the image data. Thepanel driver 30 may convert the image data, which is a digital signal,(hereinafter, referred to as digital image data) to an analog imagesignal, which is an analog voltage signal, and provide the analog imagesignal to the liquid crystal panel 20. According to the analog imagesignal, an optical property (e.g., light transmittance) of the pluralityof pixels included in the liquid crystal panel 20 may be changed.

The panel driver 30 may include, for example, a timing controller, adata driver, a scan driver, etc.

The timing controller may receive image data from the image processor90, and output the image data and a driving control signal to the datadriver and the scan driver. The driving control signal may include ascan control signal and a data control signal, which may be used tocontrol operations of the scan driver and the data driver, respectively.

The scan driver may receive the scan control signal from the timingcontroller, and in response to the scan control signal, input-activateone of the plurality of rows in the liquid crystal panel 20. In otherwords, the scan driver converts pixels included in a row among theplurality of pixels arranged in the plurality of rows and the pluralityof columns into a state of being able to receive analog image signals.In this case, input-deactivated pixels other than the pixelsinput-activated by the scan driver are unable to receive analog imagesignals.

The data driver may receive image data and a data control signal fromthe timing controller, and output image data to the liquid crystal panel20 according to the data control signal. For example, the data drivermay receive digital image data from the timing controller, and convertthe digital image data to an analog image signal. Furthermore, the datadriver may provide the analog image signal to pixels included in a rowinput-activated by the scan driver. In this case, the pixelsinput-activated by the scan driver receive the analog image signal,which makes an optical property (e.g., light transmittance) of theinput-activated pixels changed.

As such, the panel driver 30 may drive the liquid crystal panel 20according to the image data. Accordingly, an image corresponding to theimage data may be displayed on the liquid crystal panel 20.

The light apparatus 100 includes the plurality of light sources 111 thatemit light, and the plurality of light sources 111 are arranged in theform of a matrix. In other words, the plurality of light sources 111 maybe arranged in a plurality of rows and a plurality of columns.Furthermore, the light apparatus 100 may be divided into the pluralityof dimming blocks 200, each of which may include at least one lightsource.

The dimming driver 170 may receive dimming data from the image processor90, and drive the light apparatus 100 according to the dimming data. Thedimming data may include information about brightness of each of theplurality of dimming blocks 200, or information about brightness oflight sources included in each of the plurality of dimming blocks 200.

The dimming driver 170 may convert dimming data, which is a digitalsignal, (hereinafter, referred to as digital dimming data) to an analogdimming signal, which is an analog voltage signal, and provide theanalog dimming signal to the light apparatus 100. Depending on theanalog dimming signal, intensity of light emitted by light sourcesincluded in each of the plurality of dimming blocks 200 may be changed.

The dimming driver 170 may not directly provide the analog dimmingsignal to all of the plurality of dimming blocks 200, but maysequentially provide the analog dimming signal to the plurality ofdimming blocks 200 in an active matrix scheme.

As described above, the plurality of dimming blocks 200 may be arrangedin the light apparatus 100 in the form of a matrix. In other words, theplurality of dimming blocks 200 may be arranged in a plurality of rowsand a plurality of columns in the light apparatus 100.

The dimming driver 170 may sequentially provide the analog dimmingsignal to the dimming blocks belonging to each of the plurality of rows,or sequentially provide the analog dimming signal to dimming blocksbelonging to each of the plurality of columns.

For example, the dimming driver 170 may input-activate dimming blocksbelonging to a row among the plurality of dimming blocks 200, andprovide the analog dimming signal to the input-activated dimming blocks.Subsequently, the dimming driver 170 may input-activate dimming blocksbelonging to a row among the plurality of dimming blocks, and providethe analog dimming signal to the input-activated dimming blocks.

The dimming driver 170 sequentially providing the analog dimming signalto the plurality of dimming blocks 200 in an active matrix scheme willnow be described in detail.

FIG. 10 is a circuit block diagram of a dimming driver and a lightapparatus included in a display apparatus, according to an embodiment.FIG. 11 is a circuit block diagram of a driving device included in adisplay apparatus, according to an embodiment.

Referring to FIGS. 10 and 11 , the display apparatus 10 includes thedimming driver 170, a plurality of driving devices 310, 320, 330, and340, collectively 300, and the plurality of light sources 111.

The plurality of light sources may each include an LED, and may beclassified into a plurality of dimming blocks 200. A plurality of lightsources belonging to the same dimming block may form a group.

The plurality of driving devices 300 may receive an analog dimmingsignal from the dimming driver 170, and may apply a driving current tothe plurality of light sources 111 according to the received analogdimming signal.

As shown in FIG. 10 , a plurality of light sources belonging to adimming block may receive a current from the same driving device. Forexample, a plurality of light sources belonging to a first dimming block210 may receive a driving current from the first driving device 310. Aplurality of light sources belonging to a second dimming block 220 mayreceive a driving current from the second driving device 320. Aplurality of light sources belonging to a third dimming block 230 mayreceive a driving current from the third driving device 330. A pluralityof light sources belonging to a fourth dimming block 240 may receive adriving current from the fourth driving device 340. In this way, aplurality of light sources belonging to an n-th dimming block mayreceive a driving current from an n-th driving device.

Accordingly, a plurality of light sources belonging to a dimming blockmay receive the driving current with the same magnitude. Furthermore, aplurality of light sources belonging to a dimming block may emit lightwith the same intensity.

The driving devices 300 may receive the analog dimming signal from thedimming driver 170 and store the received analog dimming signal whilebeing input-activated by the dimming driver 170. Furthermore, whilebeing input-activated, the plurality of driving devices 300 may apply adriving current corresponding to the stored analog dimming signal to theplurality of light sources.

There are a plurality of scan lines S1 and S2 for providing scan signalsto the plurality of driving devices 300 from the dimming driver 170, anda plurality of data lines D1 and D2 for providing analog dimming signalsto the plurality of driving devices 300 from the dimming driver 170.

The plurality of dimming blocks 200 may be arranged in a plurality ofrows and a plurality of columns. Driving devices that apply the drivingcurrent to light sources of dimming blocks belonging to the same row mayshare the same scan line. For example, the first driving device 310 andthe second driving device 320 may share the first scan line S1, and thethird driving device 330 and the fourth driving device 340 may share thesecond scan line S2.

Furthermore, driving devices that apply the driving current to lightsources of dimming blocks belonging to the same column may share thesame data line. For example, the first driving device 310 and the thirddriving device 330 may share the first data line D1, and the seconddriving device 320 and the fourth driving device 340 may share thesecond data line D2.

The plurality of driving devices 300 may be input-activated by scansignals of the dimming driver 170, and may receive the analog dimmingsignal from the dimming driver 170.

For example, while the dimming driver 170 is outputting a scan signalthrough the first scan line S1, the first driving device 310 and thesecond driving device 320 may receive analog dimming signals through thefirst data line D1 and the second data line D2, respectively. On theother hand, the third driving device 330 and the fourth driving device340 are not able to receive the analog dimming signal.

Furthermore, while the dimming driver 170 is outputting a scan signalthrough the second scan line S2, the third driving device 330 and thefourth driving device 340 may receive analog dimming signals through thefirst data line D1 and the second data line D2, respectively. On theother hand, the first driving device 310 and the second driving device320 are not able to receive the analog dimming signal.

On receiving the analog dimming signal, the plurality of driving devices300 may store the received analog dimming signal, and may apply adriving current to the plurality of light sources according to thestored analog dimming signal.

For example, even while the dimming driver 170 is outputting a scansignal through the first scan line S1, the third driving device 330 andthe fourth driving device 340 may apply driving currents to theplurality of light sources included in the third and fourth dimmingblocks 230 and 240.

Furthermore, even while the dimming driver 170 is outputting a scansignal through the second scan line S2, the first driving device 310 andthe second driving device 320 may apply driving currents to theplurality of light sources included in the first and second dimmingblocks 210 and 220.

According to this active matrix scheme based operation, the plurality ofdriving devices 300 may sequentially receive analog dimming signals fromthe dimming driver 170, and may apply a driving current to a pluralityof light sources even while in an input-deactivated state in which noanalog dimming signal is received from the dimming driver 170.

Furthermore, according to the active matrix scheme based operation, thenumber of pins of the dimming driver 170 to provide analog dimmingsignals to the plurality of dimming blocks 200 is reduced. Moreover, thenumber of signal lines to provide analog dimming signals to theplurality of dimming blocks 200 from the dimming driver 170 is reduced.Accordingly, the number of dimming blocks may increase without limit tothe number of pins of the dimming driver 170.

The plurality of driving devices 300 may include various topologycircuits to perform the active matrix scheme based operation.

For example, as shown in FIG. 11 , each of the plurality of drivingdevices 300 may include a one-capacitor two-transistor (1C2T) topologycircuit.

Each of the plurality of driving devices 300 may include a drivingtransistor Tdr, a switching transistor Tsw, and a storage capacitor Cs.

The driving transistor Tdr includes an input terminal, an outputterminal, and a control terminal. The input terminal of the drivingtransistor Tdr may be connected to a power source Vdd, and the outputterminal may be connected to a plurality of light sources. The drivingtransistor Tdr may apply a driving current to the plurality of lightsources based on a voltage at the control terminal.

The storage capacitor Cs is provided between the output terminal and thecontrol terminal of the driving transistor Tdr. The storage capacitor Csmay output a constant voltage by storing input charges. The drivingtransistor Tdr may apply a driving current to the plurality of lightsources based on a voltage output by the storage capacitor Cs.

The switching transistor Tsw also includes an input terminal, an outputterminal, and a control terminal. The input terminal of the switchingtransistor Tsw may be connected to the data line D1 or D2, and theoutput terminal of the switching transistor Tsw may be connected to thecontrol terminal of the driving transistor Tdr. The control terminal ofthe switching transistor Tsw may be connected to the scan line S1 or S2.

The switching transistor Tsw may be turned on by a scan signal of thescan line S1 or S2, and may deliver an analog dimming signal of the dataline D1 or D2 to the storage capacitor Cs and the driving transistorTdr. The analog dimming signal of the data line D1 or D2 is input to thecontrol terminal of the driving transistor Tdr, and the drivingtransistor Tdr may apply a driving current corresponding to the analogdimming signal to the plurality of light sources. The storage capacitorCs may store charges from the analog dimming signal, and output avoltage corresponding to the analog dimming signal.

After this, even when the inputting of the scan signal is stopped andthe switching transistor Tsw is turned off, the storage capacitor Cs maystill output the voltage corresponding to the analog dimming signal, andthe driving transistor Tdr may still apply the driving currentcorresponding to the analog dimming signal to the plurality of lightsources.

A circuit as shown in FIG. 11 is an example of the driving device 300,without being limited thereto. For example, the driving device 300 mayinclude a 3T1C topology circuit obtained by adding a transistor tocompensate for body effect of the driving transistor Tdr.

The driving device 300 may be provided, for example, in a single chip inwhich the circuit shown in FIG. 11 is integrated. In other words, thecircuit shown in FIG. 11 may be integrated in a single semiconductorchip.

FIG. 12 is a cross-sectional view of a dimming driver, driving devicesand light sources included in a display apparatus, according to anembodiment.

As described above, the plurality of light sources 111 are arranged onthe substrate 112. The plurality of light sources 111 are arranged onthe front surface (a surface from which a light source module emitslight) of the substrate 112.

For efficient wiring, the dimming driver 170 may be arranged on the rearsurface (a surface from which the light source module does not emitlight, or an opposite surface of the surface from which the light sourcemodule emits light) of the substrate 112. Turning back to FIG. 2 , thesubstrate 112 on which the driving devices 300, the plurality of lightsources 111 and the dimming driver 170 are mounted may be supported bythe bottom chassis 15. The bottom chassis 15 may also support thecontrol assembly 50 and the power assembly 60. The substrate 112 may bearranged on the front surface of the bottom chassis 15, and the controlassembly 50 may be arranged on the rear surface of the bottom chassis15.

The dimming driver 170 may receive dimming data from the image processor90 included in the control assembly 50, and receive power from the powerassembly 60. Accordingly, for efficient wiring, the dimming driver 170may be arranged on the rear surface of the substrate 112, and may beconnected to the control assembly 50 and the power assembly 60 through awire passing through the opening 15 a formed at the bottom chassis 15.

The dimming driver 170 arranged on the rear surface of the substrate 112is arranged at a position corresponding to the location of the opening15 a. This may prevent the light apparatus 100 from growing thicker dueto the dimming driver 170 arranged on the rear surface of the substrate112.

To minimize the thickness of the light apparatus 100, the driving device300 may be arranged on the same surface (front surface) as the pluralityof light sources 111, as shown in FIG. 12 . Thickness of the lightsource module 110 when the driving device 300 is mounted on the samesurface as the plurality of light sources 111 is thinner than thicknessof the light source module 110 when the driving device 300 is mounted onthe different surface from the plurality of light sources 111.

As such, when the driving device 300 is arranged on the same surface(front surface) as the plurality of light sources 111, there may be anoptical defect due to the driving device 300.

As shown in FIG. 12 , the reflecting sheet 120 is arranged on thesubstrate 112. To secure an optical distance between the reflectingsheet 120 and the diffuser plate 130, the reflecting sheet 120 may betightly adhered to the substrate 112. Accordingly, a concave part 301 ofthe reflecting sheet 120 may be formed at where the driving device 300is arranged.

The concave part 301 on the reflecting sheet 120 may cause an opticaldefect in the light apparatus 100. As an example, as shown in FIG. 12 ,part of the light emitted from a light source may reflect from thesurface of the diffuser plate 130. The light reflecting from the surfaceof the diffuser plate 130 may reflect again from the reflecting sheet120. In this case, the concave part 301 of the reflecting sheet 120 maymake a region in which the light having reflected from the surface ofthe diffuser plate 130 does not arrive (or a region in which light ofweak intensity arrives, which will be hereinafter referred to as a darkregion).

When there are sporadic dark regions, diffusion of light on the diffuserplate 130 and the optical sheet 140 may prevent the dark region frombeing displayed on the screen 12 of the display apparatus 10. However,when there are regular dark regions, the dark region may be displayed onthe screen 12 of the display apparatus 10.

The driving device 300 is arranged so that the dark region from thearrangement of the driving device 300 is not displayed on the screen 12of the display apparatus 10.

FIG. 13 shows an example of arrangement of driving devices included in adisplay apparatus, according to an embodiment.

Referring to FIG. 13 , the light source module 110 includes theplurality of light sources 111, which are arranged on the substrate 112in the form of a matrix.

In this case, the plurality of light sources 111 may be classified intothe plurality of dimming blocks 200. In other words, the front surface(the surface from which light is emitted) of the light source module 110may be partitioned by the plurality of dimming blocks 200 into aplurality of dimming areas 400.

Furthermore, the light source module 110 may further include theplurality of driving devices 300 for applying driving currents to lightsources, and each of the plurality of driving devices 300 may apply adriving current to light sources included in a dimming block. Each ofthe driving devices 300 is located in a dimming area of a dimming block.

To prevent or suppress an optical defect due to arrangement of thedriving devices 300, the driving devices 300 may be irregularly arrangedin the dimming areas. Relative positions of the driving devices in thedifferent dimming blocks may be different from one another.

For example, as shown in FIG. 13 , the front surface (a surface fromwhich light is emitted) of the light source module 110 is partitionedinto a first dimming area 410 corresponding to the first dimming block210, a second dimming area 420 corresponding to the second dimming block220, a third dimming area 430 corresponding to the third dimming block230, and a fourth dimming area 440 corresponding to the fourth dimmingblock 240.

In each dimming area 400, a driving device for applying a drivingcurrent to a plurality of light sources (twelve light sources as shownin FIG. 13 ) is located. In the first dimming area 410, the firstdriving device 310 may be arranged to apply a driving current to lightsources belonging to the first dimming block 210. In the same manner, inthe second, third, and fourth dimming areas 420, 430 and 440, thesecond, third, and fourth driving devices 320, 330, and 340 may bearranged to apply driving currents to light sources belonging to thesecond, third, and fourth dimming blocks 420, 430, and 440.

The first driving device 310 is arranged in a lower right portion fromthe center of the first dimming area 410, and the second driving device320 is arranged in an upper left portion from the center of the seconddimming area 420. Furthermore, the third driving device 330 is arrangedin an upper right portion from the center of the third dimming area 430,and the fourth driving device 340 is arranged in a lower left portionfrom the center of the fourth dimming area 440.

Arrangement of the first driving device 310 in the first dimming area410 is different from arrangement of the second and third drivingdevices 320 and 330 in the second and third dimming areas 420 and 430adjacent to the first dimming area 410. Furthermore, arrangement of thesecond driving device 320 in the second dimming area 420 is differentfrom arrangement of driving devices in the adjacent dimming areas to thesecond dimming area 420.

As such, arrangement of a driving device in a dimming area is differentfrom arrangement of driving devices in other dimming areas adjacent tothe former dimming area. Here, different arrangement represents that arelative location of a driving device from the center of a dimming areais different.

The first dimming area 410, the second dimming area 420, the thirddimming area 430, and the fourth dimming area 440 are arranged in aplurality of rows and a plurality of columns.

Arrangement of the first driving device 310 in the first dimming area410 is different from arrangement of the second driving device 320 inthe second dimming area 420 belonging to the same column as the firstdimming area 410 and adjacent to the first dimming area 410.Furthermore, arrangement of the first driving device 310 in the firstdimming area 410 is different from arrangement of the third drivingdevice 330 in the third dimming area 430 belonging to the same row asthe first dimming area 410 and adjacent to the first dimming area 410.

As such, arrangement of a driving device in one of a plurality ofdimming areas arranged in a plurality of rows and a plurality of columnsis different from arrangement of a driving device in another dimmingarea belonging to the same row or column as the one dimming area andadjacent to the one dimming area.

Furthermore, a driving device in one of a plurality of dimming areasarranged in a plurality of rows and a plurality of columns is arrangedout of (i.e., outside) a virtual line defined by two driving devices intwo dimming areas belonging to the same row as the one dimming area andadjacent to the one dimming area.

The first driving device 310 in the first dimming area 410 in the firstrow and first column is arranged on the right from the center of thedimming area, and the second driving device 320 in the second dimmingarea 420 in the first row and second column is arranged on the left fromthe center of the dimming area.

As such, driving devices in a plurality dimming areas arranged in thesame row are arranged alternately on the left and right from the centerof the dimming area.

The first driving device 310 in the first dimming area 410 in the firstrow and first column is arranged in a lower portion from the center ofthe dimming area, and the third driving device 330 in the third dimmingarea 430 in the second row and first column is arranged in an upperportion from the center of the dimming area.

As such, driving devices in a plurality dimming areas arranged in thesame column are arranged alternately above and below the center of thedimming area.

The first driving device 310 is arranged closest to the second drivingdevice 320 and the third driving device 330, and the first to thirddriving devices 310, 320, and 330 are not arranged in a straight line.In other words, the first driving device 310 is arranged out of (i.e.,outside) a virtual line that connects the second driving device 320 andthe third driving device 330 closest to the first driving device 310.

As such, one of the plurality of driving devices is arranged out of avirtual line defined by two driving devices closest to the one drivingdevice.

As described above, the plurality of driving devices may be arrangedirregularly or in arbitrary positions in the plurality of dimming areas.

FIG. 14 is a plan view of driving devices included in a displayapparatus, according to an embodiment.

As shown in FIG. 14 , driving devices of four neighboring dimming areasin the same row may be arranged in different positions with respect tothe center of the dimming areas.

The first, second, fifth and sixth dimming areas 410, 420, 450, and 460may be arranged in the same row. The first driving device 310 may belocated above the center of the first dimming area 410, the seconddriving device 320 may be located on the left from the center of thesecond dimming area 420, the fifth driving device 350 may be locatedbelow the center of the fifth dimming area 450, and the sixth drivingdevice 360 may be located on the right from the center of the sixthdimming area 460.

Driving devices of four neighboring dimming areas in the same column maybe arranged in different positions with respect to the center of thedimming areas.

The first, third, ninth and eleventh dimming areas 410, 430, 490, and490 b may be arranged in the same column. The first driving device 310may be located above the center of the first dimming area 410, the thirddriving device 330 may be located on the right from the center of thethird dimming area 430, the ninth driving device 390 may be locatedbelow the center of the ninth dimming area 490, and the eleventh drivingdevice 390 b may be located on the left from the center of the eleventhdimming area 490 b.

As such, arrangement of a driving device in a dimming area is differentfrom arrangement of driving devices in other dimming areas adjacent tothe former dimming area.

Arrangement of a driving device in one of a plurality of dimming areasarranged in a plurality of rows and a plurality of columns is differentfrom arrangement of a driving device in another dimming area belongingto the same row or column as the one dimming area and adjacent to theone dimming area.

One of the plurality of driving devices is arranged out of (i.e.,outside) a virtual line defined by two driving devices closest to theone driving device.

FIG. 15 is a plan view of driving devices included in a displayapparatus, according to an embodiment.

As shown in FIG. 15 , driving devices of four neighboring dimming areasmay be arranged in different positions with respect to the center of thedimming areas.

The first, second, third and fourth dimming areas 410, 420, 430, and 440may be arranged to be adjacent to one another. The first driving device310 may be located in a lower right portion from the center of the firstdimming area 410, the second driving device 320 may be located in anupper right portion from the center of the second dimming area 420, thethird driving device 330 may be located in an upper left portion fromthe center of the third dimming area 430, and the fourth driving device340 may be located in a lower left portion from the center of the fourthdimming area 440.

The second, fourth, fifth and seventh dimming areas 420, 440, 450, and470 may be arranged to be adjacent to one another. The second drivingdevice 320 may be located in an upper right portion from the center ofthe second dimming area 420, the fourth driving device 340 may belocated in a lower left portion from the center of the fourth dimmingarea 440, the fifth driving device 350 may be located in a lower rightportion from the center of the fifth dimming area 450, and the seventhdriving device 370 may be located in an upper left portion from thecenter of the seventh dimming area 470.

The third, fourth, ninth and tenth dimming areas 430, 440, 490, and 490a may be arranged to be adjacent to one another. The third drivingdevice 330 may be located in an upper left portion from the center ofthe third dimming area 430, the fourth driving device 340 may be locatedin a lower left portion from the center of the fourth dimming area 440,the ninth driving device 390 may be located in a lower right portionfrom the center of the ninth dimming area 490, and the tenth drivingdevice 390 a may be located in an upper right portion from the center ofthe tenth dimming area 490 a.

As such, arrangement of a driving device in a dimming area is differentfrom arrangement of driving devices in other dimming areas adjacent tothe former dimming area.

Arrangement of a driving device in one of a plurality of dimming areasarranged in a plurality of rows and a plurality of columns is differentfrom arrangement of a driving device in another dimming area belongingto the same row or column as the one dimming area and adjacent to theone dimming area.

One of the plurality of driving devices is arranged out of (i.e.,outside) a virtual line defined by two driving devices closest to theone driving device.

With this arrangement of the driving devices 300, an optical defect dueto the driving devices 300 may be prevented or suppressed.

Although it is described above that a driving device applies a drivingcurrent to light sources belonging to a dimming block, it is not limitedthereto. For example, a driving device may apply a driving current tolight sources belonging to a plurality of dimming blocks.

FIG. 16 is a circuit block diagram of a dimming driver and a lightapparatus included in a display apparatus, according to an embodiment.FIG. 17 is a circuit block diagram of a driving device included in adisplay apparatus, according to an embodiment.

Referring to FIGS. 16 and 17 , the display apparatus 10 includes thedimming driver 170, a plurality of driving devices 500 (510 and 520),and the plurality of light sources 111.

The plurality of light sources 111 may be the same as the plurality oflight sources shown in FIG. 10 .

The plurality of driving devices 500 may receive an analog dimmingsignal from the dimming driver 170, and may apply a driving current tothe plurality of light sources 111 according to the received analogdimming signal.

According to what is shown in FIG. 16 , each the driving devices 500 mayapply a driving current to light sources included in a plurality ofdimming blocks 200. For example, the first driving device 510 may applya driving current to a plurality of light sources belonging to the firstdimming block 210 and a plurality of light sources belonging to thesecond dimming block 220. The second driving device 520 may apply adriving current to a plurality of light sources belonging to the thirddimming block 230 and a plurality of light sources belonging to thefourth dimming block 240. In the same manner, the n-th driving devicemay apply a driving current to a plurality of light sources belonging toa (2n−1)-th dimming block and a plurality of light sources belonging toa 2n-th dimming block.

In this case, the driving devices 500 may apply different drivingcurrents to light sources belonging to different dimming blocks based onanalog dimming signals. For example, the first driving device 310 mayapply a first driving current to light sources belonging to the firstdimming block 210 according to an analog dimming signal, and apply asecond driving current to light sources belonging to the second dimmingblock 220 according to an analog dimming signal.

While input-activated by the dimming driver 170, the plurality ofdriving devices 500 may receive analog dimming signal from the dimmingdriver 170 and store the received analog dimming signals. Furthermore,while being input-activated, the plurality of driving devices 500 mayapply a driving current corresponding to the stored analog dimmingsignal to the plurality of light sources.

The plurality of driving devices 500 may be input-activated by scansignals of the dimming driver 170, and may receive the analog dimmingsignal from the dimming driver 170. On receiving the analog dimmingsignal, the plurality of driving devices 500 may store the receivedanalog dimming signal, and may apply a driving current to the pluralityof light sources according to the stored analog dimming signal.

For example, while the dimming driver 170 is outputting a scan signalthrough the first scan line S1, the first driving device 510 may receivean analog dimming signal through the first data line D1. The firstdriving device 510 may apply a driving current to light sources of thefirst dimming block 210 and light sources of the second dimming block220 according to the received analog dimming signal. The second drivingdevice 520 may not receive an analog dimming signal, but may still applya driving current to light sources of the third dimming block 230 andlight sources of the fourth dimming block 240.

Furthermore, while the dimming driver 170 is outputting a scan signalthrough the second scan line S2, the second driving device 520 mayreceive an analog dimming signal through the first data line D1. Thesecond driving device 520 may apply a driving current to light sourcesof the third dimming block 230 and light sources of the fourth dimmingblock 240 according to the received analog dimming signal. The seconddriving device 520 may not receive an analog dimming signal, but maystill apply a driving current to light sources of the first dimmingblock 210 and light sources of the second dimming block 220.

According to this active matrix scheme based operation, the number ofpins of the dimming driver 170 to provide analog dimming signals to theplurality of dimming blocks 200 is reduced.

Further, the number of driving devices is reduced as one driving deviceapplies a driving current to light sources of a plurality of dimmingblocks. Furthermore, an optical defect due to the arrangement of thedriving devices may also be reduced.

The plurality of driving devices 500 may include various topologycircuits to perform the active matrix scheme based operation.

For example, as shown in FIG. 17 , each of the plurality of drivingdevices 500 may include a pair of 1C2T topology circuits.

Each of the driving devices 500 may include a first driving transistorTdr1, a first switching transistor Tsw1, a first storage capacitor Cs1,a second driving transistor Tdr2, a second switching transistor Tsw2,and a second storage capacitor Cs2.

Each of the first and second driving transistors Tdr1 and Tdr2, thefirst and second switching transistors Tsw1 and Tsw2, and first andsecond storage capacitors Cs1 and Cs2 may be the same as the drivingtransistor Tdr, the switching transistor Tsw, and the storage capacitorCs as shown in FIG. 11 .

The first driving transistor Tdr1, the first switching transistor Tsw1,and the first storage capacitor Cs1 may apply a driving current to lightsources of a different dimming block from that of the second drivingtransistor Tdr2, the second switching transistor Tsw2, and the secondstorage capacitor Cs2.

A circuit as shown in FIG. 17 is an example of the driving device 500,without being limited thereto. For example, the driving device 500 mayinclude a 3T1C topology circuit obtained by adding a transistor tocompensate for body effect of the driving transistors Tdr1 and Tdr2.

The driving device 500 may be provided, for example, in a single chip inwhich the circuit shown in FIG. 17 is integrated. In other words, thecircuit shown in FIG. 17 may be integrated in a single semiconductorchip.

The driving device 500 is arranged so that the dark region from thearrangement of the driving device 500 is not displayed on the screen 12of the display apparatus 10.

FIG. 18 is a plan view of driving devices included in a displayapparatus, according to an embodiment.

Referring to FIG. 18 , the light source module 110 includes theplurality of light sources 111, which are arranged on the substrate 112in the form of a matrix.

In this case, the plurality of light sources 111 may be classified intothe plurality of dimming blocks 200. In other words, the front surface(the surface from which light is emitted) of the light source module 110may be partitioned into the plurality of dimming areas 400 occupied bythe plurality of dimming blocks 200.

Furthermore, the light source module 110 may further include theplurality of driving devices 500 for applying driving currents to lightsources, and each of the plurality of driving devices 500 may apply adriving current to light sources included in two dimming blocks. Each ofthe driving devices 500 is located within two dimming areas of twodimming blocks.

To prevent or suppress an optical defect due to arrangement of thedriving devices 500, the driving devices 500 may be irregularly arrangedin the dimming areas. Relative positions of the driving devices in thedifferent dimming blocks may be different from one another.

For example, as shown in FIG. 18 , the front surface (a surface fromwhich light is emitted) of the light source module 110 is partitionedinto the first dimming area 410, the second dimming area 420, the thirddimming area 430, the fourth dimming area 440, the fifth dimming area450, the sixth dimming area 460, the seventh dimming area 470, theeighth dimming area 480, etc.

Light sources in two dimming areas are driven by a single drivingdevice. In other words, a driving device may apply a driving current toa plurality of light sources (24 light sources as shown in FIG. 18 )arranged in two dimming areas. The first driving device 510 may apply adriving current to light sources in the first and second dimming areas410 and 420, the second driving device 520 may apply a driving currentto light sources in the third and fourth dimming areas 430 and 440, thethird driving device 530 may apply a driving current to light sources inthe fifth and sixth dimming areas 450 and 460, and the fourth drivingdevice 540 may apply a driving current to light sources in the seventhand eighth dimming areas 470 and 480.

In this case, the first driving device 510 is located in the seconddimming area 420, the second driving device 520 is located in the thirddimming area 430, the third driving device 530 is located in the sixthdimming area 460, and the fourth driving device 540 is located in theseventh dimming area 470.

As such, no driving device is located in an adjacent dimming area to adimming area where a driving device is located. Furthermore, a drivingdevice is located in an adjacent dimming area to a dimming area where nodriving device is located.

In other words, in the same row, dimming areas where driving devices arelocated and dimming areas where no driving device is located arealternately arranged. Furthermore, in the same column, dimming areaswhere driving devices are located and dimming areas where no drivingdevice is located are alternately arranged.

The first driving device 510 is located on the left from the center ofthe second dimming area 420, and the second driving device 520 islocated on the right from the center of the third dimming area 430.Furthermore, the third driving device 530 is located on the left fromthe center of the sixth dimming area 460, and the fourth driving device540 is located on the right from the center of the seventh dimming area470.

As shown in FIG. 18 , driving devices may be arranged in a zigzag formalong a pair of neighboring columns of dimming areas.

As such, arrangement of a driving device in a dimming area may bedifferent from arrangement of the other driving device adjacent to theone driving device in another dimming area.

FIG. 19 is a plan view of driving devices included in a displayapparatus, according to an embodiment.

As shown in FIG. 19 , the first driving device 510 may be located in alower portion of the first dimming area 410, the second driving device520 may be located in an upper portion of the fourth dimming area 440,the third driving device 530 may be located in a lower portion of thefifth dimming area 450, and the fourth driving device 540 may be locatedin an upper portion of the eighth dimming area 480.

As such, dimming areas where driving devices are located and dimmingareas where no driving device is located are alternately arranged.

Furthermore, arrangement of a driving device in a dimming area may bedifferent from arrangement of the other driving device adjacent to theone driving device in another dimming area.

With this arrangement of the driving devices 500, an optical defect dueto the driving devices 500 may be prevented or suppressed.

FIG. 20 is a plan view of driving devices included in a displayapparatus, according to an embodiment.

As shown in FIG. 20 , the first driving device 510 may be located in alower portion of the first dimming area 410, the second driving device520 may be located in an upper portion of the fourth dimming area 440,the third driving device 530 may be located in an upper portion of thefifth dimming area 450, and the fourth driving device 540 may be locatedin a lower portion of the eighth dimming area 480.

As such, dimming areas where driving devices are located and dimmingareas where no driving device is located are alternately arranged.

Furthermore, arrangement of a driving device in a dimming area may bedifferent from arrangement of the other driving device adjacent to theone driving device in another dimming area.

FIG. 21 is a plan view of driving devices included in a displayapparatus, according to an embodiment.

Referring to FIG. 21 , the display apparatus 10 includes a plurality ofdriving devices 600 (610, 620, 630, and 640), and the plurality of lightsources 111.

Each of the driving devices 600 may apply a driving current to lightsources included in four dimming blocks. Herein, an area defined bylight sources included in four dimming blocks driven by a single drivingdevice may be defined as a driving area 700.

For example, the first driving device 610 may apply a driving current tolight sources arranged in a first driving area 710 including fourdimming blocks, and the second driving device 620 may apply a drivingcurrent to light sources arranged in a second driving area 720 includingfour dimming blocks. Furthermore, the third driving device 630 may applya driving current to light sources arranged in a third driving area 730including four dimming blocks, and the fourth driving device 640 mayapply a driving current to light sources arranged in a fourth drivingarea 740 including four dimming blocks.

Arrangement of driving devices 600 is different depending on the drivingarea 700. A location of a driving device in a driving area is differentfrom a location of a driving device in another driving area adjacent tothe former driving area.

For example, the first driving device 610 may be located in an upperleft portion of the first driving area 710, and the second drivingdevice 620 may be located in a lower left portion of the second drivingarea 720. The third driving device 630 may be located in an upper rightportion of the third driving area 730, and the fourth driving device 640may be located in a lower right portion of the fourth driving area 740.

With this arrangement of the driving devices 600, an optical defect dueto the driving devices 600 may be prevented or suppressed.

A display apparatus according to an embodiment includes a liquid crystalpanel and a light apparatus. In this case, the light apparatus mayinclude a substrate; a plurality of dimming blocks, each of theplurality of dimming blocks including at least one light source providedon a first surface of the substrate; and a plurality of driving devicesprovided on the first surface of the substrate, each of the plurality ofdriving devices applying a driving current to the at least one lightsource included in each of the plurality of dimming blocks. Furthermore,the plurality of driving devices may be arranged at different relativelocations within a plurality of dimming areas defined by the pluralityof dimming blocks, respectively.

For example, an arrangement of a driving device in one dimming area ofthe plurality of dimming areas is different from arrangements of drivingdevices in other dimming areas adjacent to the one dimming area.

For example, the plurality of dimming areas may be arranged in aplurality of rows and a plurality of columns, and an arrangement of adriving device in one dimming area of the plurality of dimming areas maybe different from arrangements of driving devices in other dimming areasarranged in the same row or column as the one dimming area and adjacentto the one dimming area.

For example, one driving device of the plurality of driving devices maybe arranged out of (i.e., outside) a virtual line defined by two drivingdevices closest to the one driving device.

Accordingly, an optical defect due to the plurality of driving devicesmay be prevented or suppressed.

The plurality of dimming blocks may emit light with at least differentbrightnesses. In other words, local dimming is implemented.

Each of the plurality of driving devices may apply a driving current tolight sources included in at least two dimming blocks.

Accordingly, the number of the plurality of driving devices may bereduced, and furthermore, an optical defect due to the plurality ofdriving devices may be reduced as well.

One driving device of the plurality of driving devices may be arrangedin a dimming area defined by one dimming block of the at least twodimming blocks.

In this case, a dimming area where the driving device is arranged and adimming area where the one driving device is not arranged may bealternately arranged.

Furthermore, an arrangement of a driving device in a driving areadefined by the at least two dimming blocks may be different fromarrangements of driving devices in other driving areas adjacent to thedriving area.

Accordingly, an optical defect due to the plurality of driving devicesmay be prevented or suppressed.

A dimming driver may be further included on a second surface of thesubstrate to provide a dimming signal to the plurality of drivingdevices.

Accordingly, efficient wiring between the dimming driver and a controlassembly/power assembly may be possible.

The dimming driver may provide the dimming signal to the plurality ofdriving devices in an active matrix scheme.

For example, the plurality of driving devices may be arranged in aplurality of rows and a plurality of columns, and the dimming driver mayprovide a scan signal to driving devices arranged in one of theplurality of rows and provide the dimming signal to driving devicesarranged in the plurality of columns.

Accordingly, the number of pins for the dimming driver to provide adimming signal to a plurality of driving devices is reduced.

The at least one light source may include an LED directly contactingwiring on the substrate and an optical dome covering the LED. The LEDhas a DBR formed on a surface from which light is emitted

Accordingly, the LED may emit more intense light in a lateral directionthan in the perpendicular direction.

The embodiments of the disclosure may be implemented in the form ofrecording media for storing instructions to be carried out by acomputer. The instructions may be stored in the form of program codes,and when executed by a processor, may generate program modules toperform operation in the embodiments of the disclosure. The recordingmedia may correspond to computer-readable recording media.

The computer-readable recording medium includes any type of recordingmedium having data stored thereon that may be thereafter read by acomputer. For example, it may be a ROM, a RAM, a magnetic tape, amagnetic disk, a flash memory, an optical data storage device, etc.

The machine-readable storage medium may be provided in the form of anon-transitory storage medium. The term ‘non-transitory storage medium’may mean a tangible device without including a signal, e.g.,electromagnetic waves, and may not distinguish between storing data inthe storage medium semi-permanently and temporarily. For example, thenon-transitory storage medium may include a buffer that temporarilystores data.

In an embodiment of the disclosure, the aforementioned method accordingto the various embodiments of the disclosure may be provided in acomputer program product. The computer program product may be acommercial product that may be traded between a seller and a buyer. Thecomputer program product may be distributed in the form of a storagemedium (e.g., a compact disc read only memory (CD-ROM)), through anapplication store (e.g., Play Store™), directly between two user devices(e.g., smart phones), or online (e.g., downloaded or uploaded). In thecase of online distribution, at least part of the computer programproduct (e.g., a downloadable app) may be at least temporarily stored orarbitrarily created in a storage medium that may be readable to a devicesuch as a server of the manufacturer, a server of the application store,or a relay server.

The embodiments of the disclosure have thus far been described withreference to accompanying drawings. A person of ordinary skill in theart would recognize that the disclosure may be practiced in other formsthan the embodiments as described above without changing the technicalidea or essential features of the disclosure. The above embodiments areonly by way of example, and may not be interpreted in a limited sense.

What is claimed is:
 1. A display apparatus comprising: a liquid crystalpanel; a plurality of light sources configured to emit light; asubstrate comprising a plurality of driving areas on the substrate, eachdriving area of the plurality of driving areas comprising a plurality ofdimming blocks, and each dimming block of the plurality of dimmingblocks comprising at least one light source of the plurality of lightsources; and a plurality of driving devices, each driving device of theplurality of driving devices being provided in one respective drivingarea of the plurality of driving areas and being configured to control adriving current of the at least one light source in each dimming blockin the respective driving area, each driving device of the plurality ofdriving devices being disposed in a dimming area corresponding to onerespective dimming block of the plurality of dimming blocks, wherein afirst driving device of the plurality of driving devices is disposed ata first position in a first dimming area of a first driving area of theplurality of driving areas, a second driving device of the plurality ofdriving devices is disposed at a second position in a second dimmingarea of a second driving area of the plurality of driving areas, thesecond driving area being directly adjacent to the first driving area,the first driving area and the second driving area are adjacent to eachother, and the first position and the second position are located inrelatively different positions of the first dimming area and the seconddimming area, respectively.
 2. The display apparatus according to claim1, wherein each driving device of the plurality of driving devices isconfigured to control a driving current of light sources in onerespective driving area.
 3. The display apparatus according to claim 2,wherein each driving device of the plurality of driving devices isconfigured to supply the same driving current to the at least one lightsource in each dimming block in the respective driving area, and eachdriving device of the plurality of driving devices is configured tosupply different driving currents to the at least one light source indifferent dimming blocks in the respective driving area.
 4. The displayapparatus according to claim 1, wherein each driving area of theplurality of driving areas comprises four dimming blocks.
 5. The displayapparatus according to claim 1, wherein the plurality of driving devicesand the plurality of light sources are provided on a first surface ofthe substrate.
 6. The display apparatus according to claim 5, whereineach driving device of the plurality of driving devices is configured toreceive a signal through a connector disposed on a second side of thesubstrate.
 7. The display apparatus according to claim 1, wherein thefirst position is located on an upper half area of the first dimmingarea, and the second position is located on a lower half area of thesecond dimming area.
 8. The display apparatus according to claim 1,wherein the first position is located on a right half area of the firstdimming area, and the second position is located on a left half area ofthe second dimming area.
 9. The display apparatus according to claim 1,wherein a position of the first dimming area in the first driving areaand a position of the second dimming area in the second driving area arerelatively different from each other in the first driving area and thesecond driving area, respectively.
 10. The display apparatus accordingto claim 1, wherein the plurality of light sources are disposed in aplurality of rows and a plurality of columns, light sources of each rowof the plurality of rows are disposed in a straight line, and lightsources of each column of the plurality of columns are disposed in astraight line.
 11. The display apparatus according to claim 1, whereineach driving device of the plurality of driving devices comprises: afirst transistor; a capacitor coupled to a control terminal of the firsttransistor; and a second transistor coupled to the control terminal ofthe first transistor.
 12. The display apparatus according to claim 1,wherein the plurality of driving devices is controlled by an activematrix method.
 13. The display apparatus according to claim 1, wherein athird driving device of the plurality of driving devices is disposed ata third position in a third dimming area of a third driving area of theplurality of driving areas, the second driving area and the thirddriving area are adjacent to each other, and the second position and thethird position are located in relatively different positions of thesecond dimming area and the third dimming area, respectively.
 14. Thedisplay apparatus according to claim 13, wherein the first position islocated on an upper half area of the first dimming area, the secondposition is located on a lower half area of the second dimming area, andthe third position is located on an upper half area of the third dimmingarea.
 15. The display apparatus according to claim 13, wherein the firstposition is located on a right half area of the first dimming area, thesecond position is located on a left half area of the second dimmingarea, and the third position is located on a right half area of thethird dimming area.
 16. The display apparatus according to claim 13,wherein a position of the first dimming area in the first driving areaand a position of the second dimming area in the second driving area arerelatively different from each other in the first driving area and thesecond driving area, respectively, and the position of the seconddimming area in the second driving area and a position of the thirddimming area in the third driving area are relatively different fromeach other in the second driving area and the third driving area,respectively.
 17. The display apparatus according to claim 16, whereinthe position of the first dimming area in the first driving area isrelatively same with the position of the third dimming area in the thirddriving area.
 18. The display apparatus according to claim 1, whereineach light source of the plurality of light sources comprises a lightemitting diode disposed on the substrate in a Chip On Board (COB) methodand an optical dome having a vertical cross section that is a bow shapeor a semicircle shape.
 19. The display apparatus according to claim 18,wherein an intensity of a first light beam which is emitted from thelight emitting diode in a first direction perpendicular to the substrateis less than an intensity of a second light beam which is emitted fromthe light emitting diode in a second direction that is different fromthe first direction.
 20. A light apparatus comprising: a plurality oflight sources configured to emit light; a substrate comprising aplurality of driving areas on the substrate, each driving area of theplurality of driving areas comprising a plurality of dimming blocks, andeach dimming block of the plurality of dimming blocks comprising atleast one light source of the plurality of light sources; and aplurality of driving devices, each driving device of the plurality ofdriving devices being provided in one respective driving area of theplurality of driving areas and being configured to control a drivingcurrent of the at least one light source in each dimming block in therespective driving area, each driving device of the plurality of drivingdevices being disposed in a dimming area corresponding to one respectivedimming block of the plurality of dimming blocks, wherein a firstdriving device of the plurality of driving devices is disposed at afirst position in a first dimming area of a first driving area of theplurality of driving areas, a second driving device of the plurality ofdriving devices is disposed at a second position in a second dimmingarea of a second driving area of the plurality of driving areas, thesecond driving area being directly adjacent to the first driving area,the first driving area and the second driving area are adjacent to eachother, and the first position and the second position are located inrelatively different positions of the first dimming area and the seconddimming area, respectively.